2ball-point + 1rubber = $3 (1)
4pen + 1rubber = $2 (2)
3pencil + 1pen + 1rubber=$1.4 (3)
(3)*2 + (2) + (1)*3
= 6pen + 6pencil + 6ball-point + 6rubber
=13.8 (4)
(4)/6=2.3
回复:文具店老板出的题
本帖于 2005-07-28 02:44:24 时间, 由普通用户 海姑娘 编辑
2ball-point + 1rubber = $3 (1)
4pen + 1rubber = $2 (2)
3pencil + 1pen + 1rubber=$1.4 (3)
(3)*2 + (2) + (1)*3
= 6pen + 6pencil + 6ball-point + 6rubber
=13.8 (4)
(4)/6=2.3
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